T-Mobile is coming out as the first-ever presenting sponsor of the MLB All-Star Game and launching a promotion that could give a total of $5 million to MLB fans. The promo boosts T-Mobile’s “Mobile Without Borders” initiative, which allows customers to use their phone in Canada and Mexico without extra fees. In order to get the chance to win a $500 travel voucher to Canada or Mexico, fans need to tweet a prediction of which MLB All-Star participant will hit a 3-Run Home Run while using the hashtags “#3for1HomeRun” and “#sweepstakes.” As soon as a 3-Run Home Run is hit, T-Mobile with randomly chose 10,000 fans who tweeted their guesses and award them their prize. Held entirely on social media, this sweepstakes offers MLB fans a chance to win big.